The utility model discloses a fan is incorporated into power networks and monitors and protection device, it mainly by multiple contact AI module, DI module, filter module, electric current peak -to -peak value detection module, 3 CPU module, storage module, DO module and communication module electricity federation in proper order constitute. The beneficial effects are that: normal condition andtrouble operating mode are distinguished to this novel adoption multiple contact data acquisition module formula, and the normal condition function is unchangeable, and the electric wire netting shortcircuit can be handled for newly -increased function to the trouble operating mode, low voltage ride through, and primary control etc. Improve fan electric wire netting adaptability, but rapidly transacting trouble operating mode shorten system response time greatly, is favorable to improving the generating efficiency of wind -powered electricity generation field fan, has great production practices meaning.